internal XlibWindow(XlibWindowProvider windowProvider)
: base(windowProvider, Thread.CurrentThread)
{
_handle = new ValueLazy <nuint>(CreateWindowHandle);
_properties = new PropertySet();
_title = typeof(XlibWindow).FullName !;
_bounds = new Rectangle(float.NaN, float.NaN, float.NaN, float.NaN);
_flowDirection = FlowDirection.TopToBottom;
_readingDirection = ReadingDirection.LeftToRight;
_isEnabled = true;
_ = _state.Transition(to: Initialized);
}
/// <inheritdoc />
public override void DispatchPending()
{
ThrowIfNotThread(ParentThread);
var display = ((XlibDispatchProvider)DispatchProvider).Display;
while (XPending(display) != 0)
{
XEvent xevent;
_ = XNextEvent(display, &xevent);
var isWmProtocolsEvent = (xevent.type == ClientMessage) && (xevent.xclient.format == 32) && (xevent.xclient.message_type == ((XlibDispatchProvider)DispatchProvider).WmProtocolsAtom);
if (!isWmProtocolsEvent || (xevent.xclient.data.l[0] != (nint)((XlibDispatchProvider)DispatchProvider).DispatcherExitRequestedAtom))
{
XlibWindowProvider.ForwardWindowEvent(&xevent, isWmProtocolsEvent);
}
else
{
OnExitRequested();
}
}
}
internal static void ForwardWindowEvent(XEvent *xevent, bool isWmProtocolsEvent)
{
IntPtr userData;
var dispatchProvider = Xlib.XlibDispatchProvider.Instance;
if (isWmProtocolsEvent && (xevent->xclient.data.l[0] == (IntPtr)(void *)dispatchProvider.WindowProviderCreateWindowAtom))
{
// We allow the WindowProviderCreateWindowAtom message to be forwarded to the Window instance
// for xevent->xany.window. This allows some delayed initialization to occur since most of the
// fields in Window are lazy.
if (Environment.Is64BitProcess)
{
var lowerBits = unchecked ((uint)xevent->xclient.data.l[2].ToInt64());
var upperBits = unchecked ((ulong)(uint)xevent->xclient.data.l[3].ToInt64());
userData = (IntPtr)((upperBits << 32) | lowerBits);
}
else
{
var bits = xevent->xclient.data.l[1].ToInt32();
userData = (IntPtr)bits;
}
_ = XChangeProperty(
xevent->xany.display,
xevent->xany.window,
dispatchProvider.WindowWindowProviderAtom,
dispatchProvider.SystemIntPtrAtom,
format: 8,
PropModeReplace,
(byte *)&userData,
nelements: IntPtr.Size
);
}
else
{
UIntPtr actualTypeReturn;
int actualFormatReturn;
UIntPtr nitemsReturn;
UIntPtr bytesAfterReturn;
IntPtr *propReturn;
ThrowExternalExceptionIfFailed(nameof(XGetWindowProperty), XGetWindowProperty(
xevent->xany.display,
xevent->xany.window,
dispatchProvider.WindowWindowProviderAtom,
long_offset: IntPtr.Zero,
long_length: (IntPtr)IntPtr.Size,
delete: False,
dispatchProvider.SystemIntPtrAtom,
&actualTypeReturn,
&actualFormatReturn,
&nitemsReturn,
&bytesAfterReturn,
(byte **)&propReturn
));
userData = *propReturn;
}
XlibWindowProvider windowProvider = null !;
Dictionary <UIntPtr, XlibWindow>?windows = null;
var forwardMessage = false;
XlibWindow?window = null;
if (userData != IntPtr.Zero)
{
windowProvider = (XlibWindowProvider)GCHandle.FromIntPtr(userData).Target !;
windows = windowProvider._windows.Value;
forwardMessage = (windows?.TryGetValue(xevent->xany.window, out window)).GetValueOrDefault();
}
if (forwardMessage)
{
Assert(windows != null, Resources.ArgumentNullExceptionMessage, nameof(windows));
Assert(window != null, Resources.ArgumentNullExceptionMessage, nameof(window));
window.ProcessWindowEvent(xevent, isWmProtocolsEvent);
if (isWmProtocolsEvent && (xevent->xclient.data.l[0] == (IntPtr)(void *)dispatchProvider.WmDeleteWindowAtom))
{
// We forward the WM_DELETE_WINDOW message to the corresponding Window instance
// so that it can still be properly disposed of in the scenario that the
// xevent->xany.window was destroyed externally.
_ = RemoveWindow(windows, xevent->xany.display, xevent->xany.window, dispatchProvider);
}
}
}
